in fortification, stakes made of strong split wood, about nine feet long, fix or seven inches square, three feet deep in the ground, in rows about two and a half or three inches asunder, placed in the covert way, at three feet from, and parallel to, the parapet or side of the glacis, to secure it from surplice. They are also used to fortify the avenues of open forts, gorges, half moons, the bottoms of ditches, and in general all posts liable to surplice. They are usually fixed perpendicularly, though some make an angle inclining towards the ground next the enemy, that the ropes cast over them to tear them up may slip off.

Turning PALISADES; an invention of M. Coehorn, in order to preserve the palisades of the covert way from the besiegers shot. 'They are so ordered, that as many of them as stand in the length of a rod, or about ten feet, turn up and down like traps, so as not to be in sight of the enemy till they just bring on their attack; and yet are always ready to do the proper service of palisades.'